Gas-engine.



No. 835,759. PATENTBD NOV. 13, 1906.

T. N. KELLETT. GAS ENGINE.

APPLIGATION FILED 0OT.1G| 1905.

LFI

UNITED sTafTss l PM orrron Specification of Letters Patent.

Patented nov. is, ieee.

Appunti@ nea october 16,1905'. sesam. zsaozei .To aZZ whom, it may concern:

.Be it known that I, THOMAS N. KELLETT, a

citizen of the United States, residing at Los Angeles, in the county of Los Angelesand State of-California, have invented new and useful Improvements in Gas-Engines, ofI

, which the following is a specification.

My invention relates to the sparking-circuit of the engine.

In operating a gas-en ine where the combustion is accomplished y means of an electric sparking apparatus it often happens that the circulating-pump which controls the ow of water to the engine-jacket and which derives its power from the engine sometimes stops-for instance, when the belt from'th'e engine-pulley slips off or is broken. When such an accident occurs, the flow of cool water to the engine-jacket is cut ofi' and the water in the jacket stops circulating, the engine continues to work and becomes so hot that it often sustains great injury lt is the object of my invention to obviate f such accidents, and to this end l have provided mechanical means whereby when the circulating-pdmp is throwny out of action from any cause whatever' the supply of cur-A rent tothe sparking apparatus is instantly cut out and the engine is brought tov a stop, thereby preventing any injurious eects. ll accomplish these objects by means of the device described herein and shown in the -accompanying drawings, in whichy Figure 1 is a plan of a gas-engine circulat- -ingumpl and water-supply with. my device app ied thereto and showing a diagram of the sparking-circuit: Fig. 2 is an enlarged detail of my device yapplied to a -portionpf the circulating-pump.

Referring to the drawings, 3 is a gas-engine of the usual type, and i is the crank-shaft, to which is attached the pulley 5, from which a connection is made, by means of a belt 6, to the pulley 7 of the circulating-pump 8. rll`bis pump is preferably ot the centriugal type and derives its water-su ply Jfrom a tank 9. The water from this tan is delivered by the pump to the engine-1- acket, from which when it becomes hotit is forced back. into the tank thrdugh the pipe 10.l

At one end or the circulating-pump', which Vis mounted on a base 11, is a governor 12,

which has the usual governor-arms 13, ivoted at 14. @n the endof' the pump-s alft 15 is a cap 16, which has an outward longitudinal movement onl the pump-shaft by means of the governor-arms. yThis cap contacts when the engine is started with the arm 18 of a bell-crank lever which is pivoted to an insulated bearing 19, mounted on the pump-base. crank lever projects inwardly far enough so that when it is moved it engages contact- The lower arm 18 of this bell-I plate 20. This arm hasan yaperture through A 'which passes a knurled screw 21 which is in threaded engagement with the pump-base. interposed between the screw-head 22 and the arm 18 'is a spring 23, which forces and holds' the larm out of engagement with the contact-plate 20 when the circulating-pump is not operating.

Leading from contact-plate 20 is line 24,

which asses lthrough battery 25 to the spark-plug 26 in the engine-cylinder. Leading from bearing 19 is line v27, which is grounded at any convenient point on, the engine-cylinder. lnterposed between the lines of the circuit isa line 28, in which is located a switch 29.

In the operation when the engine is started switch 29 is closed' temporarily until the engine attains sumcient speed to operate the governor on the pump when lthe switch is opened. rlhe movement of. the governorarms forces the cap outwardly and rocks the bell-crank lever so as to formaconnection between arm. 18 of bell-crank and contact- .plate 20, thus closing the sparking-circuit' through the lever.

, lt will thus be seen that should `the belt ,from the engine-pulley tothe pump break or slip Orl the stopping of the ump will break n the circuitV through the me ium of the bellcrank lever, thereby stopping the engine.

lt will also be seen that if the engine is sto ped from any other cause the circuit is bro (en, thus preventing any waste of the batteries.

Having described my invention, what l claim as new, and desire to secure by Letters Patent, is

1. ln a gas-engine a circulating-pump, a normally open' sparking-circuit; means to temporarily' close the circuit upon starting; means to close the circuit during the operation of the pump comprising a bell-crank lever having one arm thereof adapted tol be thrown against a contact whereby the circuit is closed; and means secured to the circulating-pump to cause the throw of the bell-e EIS crank lever to blng its erm into engagemenl with the Contact as soon as the speed of the engine reaches a predetermined point and to hold the same engaging the Contact as long as the circulating-pump operates.

2. lo e gas-engine e'oiroulating-pump; e normally open sparking-circuit; e `swtelo in said sperking-eirouit adapted to close the same and means secured to and operated by the circulating-pum to throw seid switch to close the circuit whi e said pump is operating; and means to open said switch when said pump ceases operating.

3. In e ges-engine in combination; a cil"- cula'tng-pump; a normally open sparkingeeeyzreo circuit connected to a spark-plug in the cylmdel` of the engme; e switch m smd sperli- .ing-oiouit e eprng secured 'to said switell to hold the semeA normally open; and means secured to the circulating-pump to close the switch and keep the same closed during the operation of the circulating-pump.

ln Witness that claim the foregoing l hereunto subsebed my neme this 7th lay ol' @etoloer7 1905. 

